Edwards Vacuums developed the Elri series of liquid ring pumps for applications which are wet, humid as well as corrosive. The stainless steel impeller, endplates, liquid reservoir and heat exchanger makes this pump highly resilient against corrosion and harsh process gases. The internal injection channels reduce the risk of leakage while the horizontal motor flange arrangement saves time on maintenance. The use of mechanical seals also ensures reliable operation by preventing leaks as well as extending service intervals.
The Elri is equipped with two VSD. While the main VSD matches the speed of the pump to vacuum level by adjusting its speed, the second VSD regulates the water flow through the centrifugal pump according to the operating conditions to avoid risks of cavitation. A special algorithm always maintains a perfect harmony between the two VSD’s.
The Air logic controller not only enables the monitoring of important features and parameters of the pump, but also offers the option of set-point control. While the Econtrol box even allows to connect and control multiple Elri pumps, the Icon Box enables smart monitoring and remote controlling ensures optimal servicing to get maximum uptime with the pumps.
Edwards, Burgess Hill, West Sussex, UK
